I have a system where the screen is locking, the screen is blanking, but at some point it is being powered again. I haven't investigated further what is causing this. I'm using plain Unity, 14.10 Ubuntu, and I have an Nvidia card in this system. Every morning when I arrive to my office I have the lightdm lock screen and the screen is not blank. I haven' t try what comment #24 says.
I have a system where the screen is locking, the screen is blanking, but at some point it is being powered again. I haven't investigated further what is causing this. I'm using plain Unity, 14.10 Ubuntu, and I have an Nvidia card in this system. Every morning when I arrive to my office I have the lightdm lock screen and the screen is not blank. I haven' t try what comment #24 says.